Preparing aromatic urethans
US4395565A · kind A · utility
18Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1982 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Jan 15, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C269/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of aromatic urethans by reaction between aromatic amines and alkyl carbonates, said reaction being carried out in the presence of a catalyst composed of an alcoholate of an alkali metal or an alkaline earth metal. The reaction is caused to take place at a temperature which is variable from +50.degree. C. and +150.degree. C., in the liquid phase and with a molar ratio of the carbonate to the amine of from 10:1 to 1:10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.